CN2765698Y - Vertical drilling and tapping machine - Google Patents

Abstract

A vertical drilling and tapping machine comprises a hollow rack, a power source fixed on the rear side of the rack, and a power head located on the front side of the rack, wherein the power head is provided with a main shaft, the lower end of the main shaft can be provided with various cutters, a sliding seat is arranged on the rear wall of the power head and is embedded in a dovetail groove of the rack, a transmission shaft is arranged between the power source and the main shaft of the power head, the transmission shaft transmits the motion and the power transmitted by the power source to the main shaft, the rear side of the rack is axially connected with an upright screw rod, a pair of bevel gears are sleeved on the screw rod, the power head is provided with a lifting arm which transversely penetrates through the rack, the rear end of the lifting arm is provided with a lantern ring, and spiral teeth are. The utility model discloses avoided the drive belt to skid effectively, increased the transmission moment of torsion, reduced the main shaft vibration and improved the machining precision of lathe.

Description

Vertical drilling and tapping machine

Technical field:

The utility model relates to a metal cutting machine tool, in particular to a vertical drilling and tapping machine.

Background technique:

At first please refer to a kind of traditional vertical drilling and tapping machine shown in Fig. 1 and Fig. 2, it mainly comprises an upright circular column 1a, there is no rack 2a outside this column 1a, a movable head 3a covers Connected to the column 1a, a gear (not shown) is provided inside to engage with the rack 2a, so that the machine head 3a can move up and down along the column 1a by means of the gear and the rack 2a. The rear side of this head 3a is provided with a motor 4a, and the front side is provided with a main shaft 5a, and the mandrel of motor 4a drives main shaft 5a to rotate by transmission belt, and the cutter such as this main shaft 5a lower end can install drill bit or screw tap and carry out metal cutting work. In order to make the machine head 3a slide smoothly on the column 1a, there must be a small gap between the machine head 3a and the column 1a. However, this will cause the main shaft 5a and the tool to vibrate during the operation of the machine, resulting in machining reduction in precision.

Please refer to another known drilling and tapping machine shown in Figure 3, which includes a square upright frame 1b, a motor 2b is fixed on the rear side of the frame 1b top, and its front side is provided with a vertical main shaft 3b, pulleys are sleeved on the top of the motor 2b and the main shaft 3b, and a transmission belt is looped on the two pulleys so that the motor 2b drives the main shaft 3b to rotate. There is a lifting seat 4b under the main shaft 3b, and a chute 5b is provided on the rear side of the lifting seat 4b to engage with the dovetail seat 6b on the front side of the frame 1b, so that the main shaft 3b can move up and down to adapt to the height of the workpiece . Since the lifting seat 4b is connected to the frame 1b through the dovetail seat 6b, the shaking of the main shaft 3b and the tool during the cutting process is overcome, and the defects of the aforementioned first drilling and tapping machine are improved. But because the motor 2b is fixed on the top of the frame 1b, and the main shaft 3b adapts to the position of the workpiece by the up-and-down displacement movement of the lifting seat 4b, the length of the main shaft 3b must be long enough to adjust the large distance. However, too long main shaft 3b will lead to weakening of its rigidity, thereby reducing the transmitted working torque, and at the same time, too long main shaft 3b also increases the manufacturing cost.

For overcoming the shortcoming of above-mentioned two kinds of machines, a third kind of drilling and tapping machine has appeared again, as shown in Figure 4. This drilling and tapping machine includes a vertical frame 1c, the rear side of this frame 1c is provided with motor 2c, its front side is provided with lifting seat 3c, and this lifting seat 3c rear side is provided with chute 4c and frame The dovetail seat 5c on 1c is embedded in order to adjust the up and down position of the lifting seat 3c. A transmission belt 6c passes through the front and rear holes 7c on the frame 1c to connect the motor 2c and the main shaft 8c on the lifting seat 3c, so that the motor 2c drives the main shaft 8c to rotate. The transmission scheme of this design not only solves the problem of spindle shaking caused by the gap between the column 1a and the machine head 3a of the first type of drilling and tapping machine, but also improves the second type of drilling and tapping machine through the synchronous lifting of the motor 2c and the lifting seat 3c. The main shaft of the hole tapping machine is too long, which weakens the defect of the transmission working torque. However, because the distance between the motor 2c and the main shaft 8c is too long, the length of the transmission belt 6c is too long. Therefore, in the case of large-diameter drilling and cutting force, the tension of the transmission belt 6c will be insufficient and cause slippage. At the same time, the transmission belt 6c is too long. It will also cause vibration in the transmission, thereby causing the vibration of the frame 1c, the lifting seat 3c and the main shaft 8c, resulting in a reduction in machining accuracy.

Invention content:

The purpose of the utility model is to overcome the shortcomings of traditional drilling and tapping machine transmission belt slipping and main shaft vibration, and provide a drilling and tapping machine that avoids transmission slipping, increases transmission torque, reduces main shaft vibration, and improves machining accuracy.

The technical solution adopted by the utility model to solve the technical problem is that a vertical drilling and tapping machine includes a hollow frame inside, a power source fixed on the rear side of the frame, and a power source located on the front side of the frame. The power head has a main shaft that can be equipped with various tools at the lower end, and its rear wall is provided with a sliding seat embedded in the dovetail groove of the frame, and a transmission shaft is provided between the power source and the main shaft of the power head. The transmission shaft transmits the motion and power transmitted by the power source to the main shaft; a vertical screw is connected to the shaft at the rear of the frame, and a pair of bevel gears are fixed on the screw; the power head is equipped with a lift The arm passes through the frame horizontally, and a collar is provided at the rear end of the lifting arm, and a helical tooth is provided in the inner hole of the collar to be screwed together with the above-mentioned screw rod.

The power source of the vertical drilling and tapping machine described in the utility model can be an electric motor, and the top of the mandrel and the top of the transmission shaft are respectively provided with at least one pulley, and each of the pulleys has wheel grooves of different diameters, and each corresponding wheel The same V-shaped transmission belt is applied to the groove pair; the first synchronous pulley is sleeved on the transmission shaft, the second synchronous pulley is sleeved on the main shaft, and a synchronous belt connects the two synchronous pulleys; the transmission shaft is sleeved with a rotating part and A shaft sleeve, the rotating part can rotate with the transmission shaft and is fixedly connected with the first synchronous pulley. There are rolling bearings; the middle section of the frame is provided with a long opening through the front and back, and the hand rocker outside it is connected with the above-mentioned bevel gear and drives the bevel gear to rotate.

Compared with the existing traditional drilling and tapping machine, the utility model has the beneficial effect that an intermediate transmission shaft is added between the power source and the main shaft of the power head, and a synchronous belt transmission with a fixed transmission ratio is adopted. , so as to avoid the slipping of the transmission belt, increase the transmission torque, and ensure the need for large-aperture drilling. At the same time, the shortening of the transmission belt length reduces the vibration of the transmission belt, thereby reducing the vibration of the main shaft and improving the machining accuracy.

Description of drawings:

Fig. 1 is the front view of the first known drilling and tapping machine.

Fig. 2 is a left view of the first known drilling and tapping machine.

Fig. 3 is a structural schematic diagram of a second known drilling and tapping machine.

Fig. 4 is a structural schematic diagram of a third known drilling and tapping machine.

Fig. 5 is a schematic perspective view of the appearance of the utility model.

Fig. 6 is a schematic sectional view of the structure of the utility model.

Fig. 7 is a schematic diagram of the position of the power head of the utility model when it is lowered.

Fig. 8 is a schematic diagram of a partial structure of the lifting mechanism of the present invention.

Detailed ways:

Below in conjunction with specific embodiment and accompanying drawing, the utility model is described in further detail.

First please refer to Fig. 5 and Fig. 6 for the three-dimensional and structural schematic diagrams of the utility model. The illustrated drilling and tapping machine includes a vertical frame 10 , a power source 20 and a power head 30 . The middle of described frame 10 is cavity and cross-section is U-shaped, and its middle section has a vertical opening 155 that runs through the front and rear of an elongated shape, and the vertical direction of the front wall of this frame 10 is provided with dovetail groove 11; The power source 20 is an electric motor, which is vertically fixed on the top of the rear side of the above-mentioned frame 10 in an axial direction, and at least a pulley 22 is sleeved on the mandrel 21, and the pulley 22 has three wheel grooves 23 with different diameters; The rear wall of the power head 30 is provided with a sliding seat 31 embedded in the dovetail groove 11 of the above-mentioned frame 10, whereby the power head 30 can move up and down along the vertical direction of the frame 10, and the power head 30 has a rotatable Main shaft 32, the lower end of the main shaft 32 can be equipped with cutters such as drill bits, reamers, and thread taps or multi-axis devices, so as to carry out metal cutting work. The power head 30 is provided with a horizontal lifting arm 34 passing through the opening 155 of the frame 10, the rear end of the lifting arm 34 is provided with a collar 341, and the inner hole of the collar 341 is provided with a helical tooth 342; An upright screw rod 12 is connected to the rear side of the frame 10, and the screw rod 12 is screwed on the helical teeth 342 in the inner hole of the collar 341 on the lifting arm 34; The meshing bevel gear 13 with the axis at 90°, one of the pair of bevel gears 13 is fixed on the screw rod 12 through its wheel hole and can drive it to rotate, and the other bevel gear 13 is fixed on the outer side of the frame 10 laterally. On the hand rocker 14, when the hand rocker 14 is rotated, it can drive the bevel gear 13 to rotate, and then drive the screw 12 to rotate forward or reversely, thereby driving the lifting arm 34 and the power head 30 to rise through the collar 341 Or drop, thus make the main shaft 32 rise or fall accordingly to adapt to the height of the position of the workpiece to be processed (see Figure 7). A transmission shaft 15 is arranged between the power source 20 and the main shaft 32 of the power head 30, the transmission shaft 15 is located inside the hollow frame 10, and the first synchronous pulley 153 is sleeved on it, and the transmission shaft 15 is also sleeved There is a rotating part 156, which can rotate with the transmission shaft 15 and is fixedly connected with the first synchronous pulley 153, thereby driving the first synchronous pulley 153 to rotate. The transmission shaft 15 is also sleeved with a shaft sleeve 157. The shaft sleeve 157 is fixed on the lifting arm 34 and can slide axially along the transmission shaft 15, and a rolling bearing is installed between it and the wheel hole of the first synchronous pulley 153; the top of the transmission shaft 15 is at least covered with a pulley 151, the pulley 151 also has three different diameter wheel grooves 152 corresponding to the pulley 22 on the motor spindle 21 of the power source 20, between the three wheel grooves 152 and the three wheel grooves 23 on the pulley 22 Match respectively in size to form three wheel groove pairs with the same perimeter. They can be applied with the same V-shaped transmission belt 24. The transmission belt 24 connects the transmission shaft 15 and the motor spindle 21. There is a second synchronous pulley 33 and a synchronous belt 154 to connect the above-mentioned first and second synchronous pulleys (153, 33). The drive shaft 15 is then transmitted to the main shaft 32 of the power head 30 through the synchronous belt 154, thereby realizing the cutting process of the workpiece.

The above-mentioned transmission technical scheme through the intermediate transmission shaft 15 and the adoption of the synchronous belt 154 with a fixed transmission ratio effectively shorten the length of the transmission belt, avoid the slippage of the transmission belt, and reduce the vibration of the transmission belt, thus ensuring the power of large-aperture cutting Transmission and machining accuracy. In addition, the manual lifting mechanism composed of the hand lever 14, the bevel gear 13 and the screw rod 12 realizes the lifting of the power head 30 in a large range and improves the adaptability of processing. At the same time, the transmission shaft 15 and the screw rod 12 are respectively arranged on 10 inside and rear side, which effectively avoids the adhesion of processing chips and ensures normal transmission.

Claims (6)

1. A vertical drilling and tapping machine, comprising a hollow frame (10), a power source (20) fixed on the rear side of the frame (10), and a power source located at the front side of the frame (10). head (30), the power head (30) has a main shaft (32) that can be equipped with various cutters at the lower end, and its rear wall is provided with a sliding seat (31) embedded in the dovetail groove (11) of the frame (10) Inside, it is characterized in that: a transmission shaft (15) is provided between the power source (20) and the main shaft (32) of the power head (30), and the transmission shaft (15) transmits the motion from the power source (20) And the power is transmitted to the main shaft (32) in turn; the rear side of the frame (10) is axially connected with an upright screw (12), and a pair of bevel gears (13) are sleeved on the screw (12); The power head (30) is provided with a lift arm (34) that passes through the frame (10) transversely, and the rear end of the lift arm (34) is provided with a collar (341), and the inner hole of the collar (341) is provided with a helical tooth (342) is screwed together with above-mentioned screw rod (12). 2. The vertical drilling and tapping machine according to claim 1, characterized in that: the power source (20) is an electric motor, and at least one pulley (22) is provided on the top of the motor mandrel (21). The top of the drive shaft (15) is also provided with at least one pulley (151), and the two pulleys (22, 151) are looped together by a drive belt (24). 3. The vertical drilling and tapping machine according to claim 2, characterized in that: the pulley (22) on the motor mandrel (21) has three wheel grooves (23) with different diameters, and the drive shaft Belt pulley (151) on (15) also has the wheel groove (152) of three different diameters, and each corresponding wheel groove pair (23,152) is applied with same V-shaped transmission belt (24). 4. The vertical drilling and tapping machine according to claim 1, characterized in that: the transmission shaft (15) is covered with a first synchronous pulley (153), and the main shaft of the power head (30) ( 32) the second synchronous belt pulley (33) is set on, and a synchronous belt (154) is encased in two synchronous belt pulleys (153, 33) jointly; The transmission shaft (15) top is covered with a belt that can rotate with the transmission shaft (15). The rotating part (156), the rotating part (156) is fixedly connected with the first synchronous pulley (153), and a shaft sleeve (157) which can slide axially is also sleeved on the transmission shaft (15). (157) is fixedly connected on the lifting arm (34), and a rolling bearing is installed between the first synchronous pulley (153). 5. The vertical drilling and tapping machine according to claim 1, characterized in that: the bevel gear (13) is connected with a hand rocker (14) outside the frame (10), the hand rocker ( 14) the rotation can drive screw rod (12) to do forward and reverse rotation. 6. The vertical drilling and tapping machine according to claim 1, characterized in that: the middle section of the frame (10) is provided with an elongated opening (155) passing through the front and back.

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